HINGE JOINT Russian patent published in 2012 - IPC B25J17/00 

FIELD: machine building.

SUBSTANCE: invention relates to industrial robot hinge joint between working tool and wrist comprising reversing rotary shaft of robot body with rotary section incorporating rotary section. Proposed hinge joint comprises fixed wall fitted on wrist to receive no shaft torque and wall to receive reversing shaft torque and turn joint with said shaft, fluid circulation circuit communicating wrist with working tool. Fluid circulation circuit comprises fluid feed hose and fluid discharge hose. Said hoses are wound about rotary section coupled with said shaft to turn jointly therewith to make loose coiling spiral between wrist and working tool. Note here that one end of every hose is secured to said fixed wall while opposite end of every hose may displace in displacement of said shaft.

EFFECT: tight fluid circulation circuit, ease of hose replacement from outside.

4 cl, 6 dwg